Coinciding with this, a new, two-hour documentary entitled "Aliens: A Definitive Guide" is set to air on Discovery on Sunday, June 2 at 8 p.m. ET/PT in Canada. This Canada-U.K. joint production studies the opinions of real scientists about the existence of aliens and what they might look like, from the versions presented in all those summer blockbusters to the scientific proposals of what they may resemble.

As posited by scientists in "Aliens: A Definitive Guide," alien lifeforms may have been crashing into Earth for eons, buried in meteorites, and that opens up a whole new area of speculation and investigation about our history, human or otherwise, and what alien lifeforms may have already affected or advanced it.

Did you know:

78 percent of Canadians think extraterrestrials are out there.

55 percent of Canadians think otherworldly beings have been to our planet.